Electronic transformer of electric energy meter

A technology of electronic transformer and electric energy meter, which is applied in the field of electric energy meter, can solve the problems such as difficulty in current high-precision measurement, and achieve the effect of small influence error and high-precision measurement

Inactive Publication Date: 2019-05-03
宁波泰丰源电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the transformers on the market to maintain high-precision measurement of current without being affected by power factors.

Method used

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  • Electronic transformer of electric energy meter
  • Electronic transformer of electric energy meter
  • Electronic transformer of electric energy meter

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Experimental program
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Effect test

Embodiment 1

[0014] Such as Figure 1-3 An electric energy meter electronic transformer includes a casing 1 and a current connecting piece 2, and an electromagnetic induction component is installed in the casing 1, and the electromagnetic induction component includes a high magnetic permeability magnetic core 4 with a gap, and the A coil 5 is wound on the high permeability magnetic core with a gap, and a tunnel magnetoresistance chip 6 is installed at the gap of the high permeability magnetic core 4 with a gap, and the tunnel magnetoresistance chip 6 passes through the circuit and the coil 5 The coil 5 is connected to the main circuit board 7 through a circuit, and the current connection piece 2 passes through the high magnetic permeability magnetic core 4 with a gap.

[0015] Described main circuit board 7 comprises first operational amplifier 10, and described first operational amplifier 10 is connected with tunnel magnetoresistive chip 6 through first resistance 11 and second resistance...

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Abstract

The invention discloses an electronic transformer of an electric energy meter. The electronic transformer comprises a housing and a current connecting piece. An electromagnetic induction component isinstalled in the housing and includes a notched high-permeability magnetic core; a coil winds around the notched high-permeability magnetic core; a tunnel magneto-resistive chip is mounted on the notch of the notched high-permeability magnetic core and is connected with the coil by a circuit; the coil is connected to the main circuit board by a circuit; and the current connection piece passes through the notched high-permeability magnetic core. Therefore, the high-precision measurement of the current can be kept without being affected by the power factor. The influence errors on the direct current and even-order harmonics in the AC line are extremely low.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to an electronic transformer for electric energy meters. Background technique [0002] Transformers are used in measurement or protection systems. In order to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. Therefore, the transformer is the main instrument of the electric energy meter. However, it is difficult for transformers on the market to maintain high-precision measurement of current without being affected by power factors. The impact of DC and even harmonics in AC lines is relatively large. Contents of the invention [0003] The purpose of the present invention is to provide an electric energy meter electronic transformer, which has the function of maintaining high-precision measurement of current without being affected by power factors, and has the function of very small influ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/18G01R11/04G01R19/00
Inventor 袁郭俊
Owner 宁波泰丰源电气有限公司
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